Science Crosswords Puzzle for Grade 7

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Across
  1. 2. A tiny plant inside a hard cover waiting to grow.
  2. 4. To change from a liquid to a solid by cooling.
  3. 5. A material that restricts or blocks the flow of heat or electric current.
  4. 6. An organ used for breathing air.
  5. 9. The process plants use to make food using sunlight, carbon dioxide, and water.
  6. 12. The green pigment in plant leaves that absorbs light energy for photosynthesis.
  7. 13. The colorful plant part used for reproduction.
  8. 16. An organism that gets energy by eating other living things.
  9. 17. A material that easily allows heat or electricity to flow through it.
  10. 18. An object that pulls iron or steel toward itself.
  11. 21. The bouncing back of light or sound waves when hitting a surface.
Down
  1. 1. The basic structural and functional unit of all living organisms.
  2. 3. The process where a liquid changes into a gas when heated.
  3. 7. Matter that spreads out to fill a space, like air.
  4. 8. An organism, usually a green plant, that makes its own food in a food chain.
  5. 9. The transfer of pollen from the male part of a flower to the female part.
  6. 10. A state of matter with a fixed shape and volume.
  7. 11. A dark shape formed when an object blocks light.
  8. 14. The part of a plant underground that drinks water.
  9. 15. To change from a solid to a liquid by heating.
  10. 19. The main part of a plant where food is made.
  11. 20. A state of matter that flows and takes the shape of its container.